Incandescent lamp.



D. H. BERING.

INGANDESGENT LAMP. An moATxon FILED NOV. 13, 1909.

Patented Oct. 18, 1910.

2 SHEETS-SHEET 2.

. specific structure shown DELO HHOKE BERING, or PITTSBURG,PENNSYLVANIA.

INCANDESGENT LAMP.

Specification of Iietters Patent;

Patented Oct. 18, 1910.

Application filed November 13, 1909. Serial No. 527,829.

' To all whom it may concern:

'lamp may be regulatedand controlled.

Another object of my invention is to provlde an incandescent, electriclamp so'arranged thatthe light may be successively decreased orihcreased.

\Vith the above and other objects in view 7 the present inventionconsists in the combinatlon and arrangement of parts as will behereinafter more fully described and particularly pointed out in theappended claims,

it being understood that changes in the and described may bemade withinthe scope of'the claims without departing from the spirit of theinvention.

- In the drawings forming a part of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 shows an elevational view of .a lamp embodyin my invention.Fig. 2 shows an enlarge detached detail of the switch bed. Fig. '3 showsan enlarged frag mentary portion of the central post with one Fig. 4shows a wiring, plan. Fig. 5 shows a bottom view of the 0st andconnected arms. Fig. 6' shows a etail of the case and socket screw.

.In the accompanying drawingsthe numeral 10 designates the bulbofanysuitable size and configuration, 11 the supporting col-.

lar'carried'b'ythe head 14, this head being made of suitable nonconducting material. As shown in 1Fi '..1-:this head is provided fromwhich exend carries a pluralityr'of radi- 21 and 22; ear the upper endthis hollow tubular post 16 is provided with a cone spending set-of. re"arly extending arms marked 17,18. 20',2'1 and 22. As

diagram. Each of shown, these arms are held in parallel spaced relationand are disposed in sets of two. These radially extending arms are inthe form of glass tubes. which have their ends closed and reduced toform the annular termination 5. This construction, referring only to theupper set of arms, the lower arms being merely closed at their ends.

Secured to the head 14, is the switch bed 24 made of white enamel wareof suitable composition, which carries the pivoting 25 piv'otallysupporting the sector shaped switch plate 26 and the handle 27 ofsuitable non-conducting material. Held within this switch bed, are theterminal 31, 32' and 33, from which extend the feeders 35, 36, 37 and38. clearly in the wiring diagram these feeders are respectively led tothe arms 20', 21 and 22', these being respectively connected to thefilaments 40,. 41, 42, 43, 44 and 45.

Held within the post 16, is the return feeder 46, which is carriedthrough'the head 14 as is usual in the art. lower set of radiallydisposed arms are the conductors or lead wires,-preferably made ofplatinum and 51 andv 52, as clearly shown in the wiring the lead wiresis connected to the feeder 46, as is also indicated in Fig. 5.

In .the drawings I have shown a lamp socket provided with six sets ofarms and carrying six filaments marked 40, 41, 42, 43

As shown more plugs 30,

numbered 47,48, 49, 50,

44' and 45. Extending from the terminal plug 30, is the conductor35 indirect con nection with the filament 40. Extending "from the terminalplug 31 is thelead wire 36 in circuit with the second filament 41.

The third'filament 42, however, by means of a lead wire 50 is,connected'to the fourth filament 43 and this filament 43, by means ofthe lead wire 37 being connected to the terminal plug 32.

last terminal plug 33 is the lead wire 38 in ment, by means of the wire42' is in clrcuit with the filament 45, as shown.

Secured to the head 14 the ilsual case 12 havinga slot 53 through whichthe switch operating handle 27 projects. The case is provided with theusual insulation 55 andthe' socket screw 56 to which the returnfeeder7'46 is connected. To the central stem or button '57, held withinthe screw socket i Extending. from the connection with the filament 44,which filaterminal 31 and which forms the remaining terminal, is securedthe wire 58 led to the switch 26.

From the foregoing it will be seen that in my present invention Iprovide an incandescent electric lamp having two single filaments andtwo sets of .double filaments, all of which can be successively throwninto circuit. I

The operation of the device when the switch 26 is brought intoengagement with the terminal 30 is as follows: The current passes intothe switch 26, thence through the conductor 35, through the filament 40,the wire 47 and finally through the feeder 46. A single'fil ament throwninto circuit would serve as a night lamp or where a subdued light wouldbe desired. On carrying the switch into contact with the second thesecond single filament would be thrown into circuit. The next twosuccessive advancements of the switch will result in the connectedfilaments being brought into circuit, so that finally all six filamentswill be aglow. To dim the light then, it is-simply necessary to carrythe switch backward.

'- The various conductors are all properly insulated as is understood bythose skilled in' the art. para't1'vely inexpens ve in construction andThe lamp is simple and comboth du-rable'and efficient in operation. Thefilament lQ'Wllel the device is used as a night lamp would bethe firstto be consumed. \Vhen this occurs the operator simply brings into playthe second single feeder 41.

Having thus described my said invention,

what is claimed is 1. An electrlc incandescent lamp comprising a head, apost projecting from said head havlng a plurality of radially extendmgup er and lower arms disposed in sets of tw a switch carried by saidhead, a filament suspended between one set of said arms, a conductorextending from one end of said filament into the path of said switch, afeeder contacting with said switch, a return feeder within said post incircuit with said filament, a second filament held between a set ofarms, av third filament held between a set of arms, a conductorconnecting said second and third filaments, a feeder extending from oneof said last mentioned filaments'into the path of said switch and aconductor extending from said second and third filament to said returnfeeder.

2. An electric incandescent lamp having in combination a non-conductinghead, a glass post projecting from said head having a plurality ofradially extending upper and lower arms disposed in sets of two, aswitch bed carried by said head, a switch carried by said bed, afilament suspended-between one set of said arms, a conductor extendingfrom one end of said filament into the path of said switch, a feedercontacting with said switch, a return feeder within said post in circuitwith said filament, a second filament held between the set of arms, athird filament held between a set of arms, a conductor connecting saidsecond and third filaments, a feeder extending from one of said lastmentioned filaments into the path of said switch, and a conductorextending from said second and third filament to said return feeder i Intestimony whereof I affix my signature,

in presence of two witnesses.-

